It is currently Wed May 12, 2021 8:53 am

All times are UTC





Post new topic Reply to topic  [ 3 posts ] 
Author Message
 Post subject: 1988 Paso Valve Clearances
PostPosted: Fri Mar 19, 2021 1:10 am 
Offline

Joined: Wed Jun 24, 2020 6:27 pm
Posts: 31
Location: USA
model: 750 Paso
year: 1988
I've searched the forum for a possible answer to this question, but maybe I'm using the wrong key words as I've come up empty. The question isn't what are the specified clearances, it's what, in the experience of those, well, more experienced, is too tight? Just checked the valves, and all of the opening shim clearances were what I'd call a very loose .003in, almost .004in, which is spec. I used the unload method for checking the closing shims and they're all in spec at .001in, with one being tight, perhaps on the order of .0008in. The shim caps all spin easily when I unload the closing rocker arm. Are my opening clearances acceptable against a recommended .004in? Is the one slightly tight closing clearance cause for concern?

This is my first Ducati, so my operating knowledge is limited. At present, I don't even know if the engine runs. I'm working through it slowly with the aim of ensuring it actually runs before I commit substantial time/money. OK, I know it'll take plenty of time, but ...

Thanks in advance for any insight.

_________________
1973 BMW R75/5
1974 Laverda SF2
1976 Suzuki GT185
1983 Lavarda RGS 1000
1988 Ducati Paso 750
1995 BMW K75


Top
 Profile  
Reply with quote  
 Post subject: Re: 1988 Paso Valve Clearances
PostPosted: Fri Mar 19, 2021 10:35 am 
Offline
paso grand pooh-bah
User avatar

Joined: Thu Nov 03, 2011 10:13 am
Posts: 765
Location: Scotland
model: 907 I.E.
year: 1994
I'd be happy with those clearances. I'm not sure about the 750 engines but for the 904 at one time Ducati specified .003" inlet and .004" exh for openers, that was later changed to .004" and .005".
Even if you can't measure the gap, as long as all the closers can spin when you press down on the closing rocker arm they are good

_________________
1994 907ie
2017 Supersport 939
2015 Scrambler Classic
1982 Pantah 500SL (now sold)


Scotland


Top
 Profile  
Reply with quote  
 Post subject: Re: 1988 Paso Valve Clearances
PostPosted: Fri Mar 19, 2021 8:12 pm 
Offline

Joined: Wed Jun 24, 2020 6:27 pm
Posts: 31
Location: USA
model: 750 Paso
year: 1988
Thanks for the input. Based on experience with other engines the numbers I got didn't seem far enough off to warrant a readjust, but not really knowing these engines or how tolerant they are I was interested in experienced opinions. From what I've learned, a previous owner sent the heads out to a shop in Chicago. This likely would have been in the mid- to late-90s. He apparently didn't feel confident attempting adjustment and didn't have access to shims, so he removed the heads and sent them out. I have no idea what shop, but assuming it was someone familiar with belt-drive Ducs.

_________________
1973 BMW R75/5
1974 Laverda SF2
1976 Suzuki GT185
1983 Lavarda RGS 1000
1988 Ducati Paso 750
1995 BMW K75


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 3 posts ] 

All times are UTC


Who is online

Users browsing this forum: No registered users and 15 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to: